In brief:
Need more informatio

Need more information as to any past history of asthma in childhood, history of smoking if any, any pulmonary function tests done in office and report, any responce to meds like steroid and bronchdilaters if ever prescribed.

In brief:
Need more informatio

Need more information as to any past history of asthma in childhood, history of smoking if any, any pulmonary function tests done in office and report, any responce to meds like steroid and bronchdilaters if ever prescribed.

If the xray is normal lung cancer is not likely.
If you are still concerned consult a pulmonary specialist.It may be asthma or COPD need pulmonary function test.It may be reflux.
Would you like to video or text chat with me?